Lathe-tool holder.



No. 838,453. PATENTE) DEG, 11, 1906.- Jlv W.- REYNOLDS. I LATHE T001. HOLDER.

Jaim: W'eynogi S557 j @trouw w JOHN NV. REYNOLDS, OF PROOTOR, VERMONT.

LATHE-TOOL HOLDER.

Specification of Letters Patent.

Patented Dec. 11, 1906,

Application filed November 4, 1905. Serial No. 285,902.

T0 cir/ZZ wiz/071@ t may concern:

Beit known that l, JOHN W. REYNOLDS, a citizen of the United States, residing at Proctor, in the county of Rutland and State of Vermont, have invented new and useful Iniprovements in Lathe-Tool Holders, of which the following is a specification.

My invention relates to lathe-tool holders, and its primary object is to provide a holder having one of its ends bifurcated in a manner to provide a comparatively thick, rigid, and unyielding member and a comparatively thin yielding member adapted to be moved in the direction of the rigid member to clamp the tool inthe holder and one wherein the tool may be readily and quickly adjusted to any point in an almost complete circle and rigidly held in its adjusted position. The provision of the comparatively thick, rigid, and unyielding member prevents the rattling and chattering of the tool.

llith the above and other objects in view the invention consists of the construction,

combination, and arrangement of parts hereinafter fully described, claimed, and illustrated in the accompanying drawings, wherein- Figure l is a view in side elevation of the forward end of a tool-holder constructed in accordance with my invention, the head thereof being in section 3 and Fig. 2 is a top plan view thereof.

Referring to the drawings by referencenumerals, l designates the shank adapted to be clamped in the tool-post of a lathe and having one of its ends enlarged to provide a head 2, which is adapted for the reception of a tool, and inclined upwardly at a slight angle to the plane of the shank, so as to give to the tool a smoother cutting edge than is provided in a tool-holder wherein the head is arranged in the plane of the shank. The head 2 is bifurcated. The slot 3 of the bifurf cation extends through the head 2 in the member 2a and yielding member 4 are respectively provided with alining openings 5 6, which intersect the slot 3 and are arranged to extend transversely through the members. The opening 5 is countersunk, as at 7, to provide for the reception of a clamp-bolt S, having a tapered head 9. The upper end of the bolt is screw-threaded, as at 10, and extends through the opening 6 and above the yielding member 4. Mounted upon the threaded end of the bolt 8 and resting upon the yielding member i is a nut l1.

The bolt S is provided with a rectangular opening 12, adapted for the reception of one end of the shank of a tool, which, owing to the rectangular formation of the opening, cannot have any rotary movement relative to the bolt. The opening 12 has a longitudinal extent greater than the transverse extent of the tool and the transverse extent of the slot 3, whereby when the tool is inserted into the opening l2 it rests upon the rigid member 211. After the tool has been thus applied the nut 1]. is turned to move the yielding member 4 in the direction of the rigid member 2a, thus bringing the yielding member in engagement with the tool and clamping the latter therebetween and the rigid member. When the nut 1l is turned to clampvthe tool between the yielding and rigid members, the tapered head 9 of the bolt 8 is moved into the countersunk portion 7 of the opening 5, and thereby held against turning.

ln order to add strength to the yielding member 4c, the upper longitudinal edge of the shank at that point where it merges into the head 2 is enlarged, as at 13. The slot 3 permits the tool to be swung in almost a complete circle, with the clamp-bolt 8 as its axis.

lt should be apparent that the rigid member 2L prevents the rattling and chattering of the tool, that the tool may be readily and quickly adjusted to any point in an almost complete circle, and that the tool may be readily, quickly, and rigidly secured in position. lt should also be apparent that the holder may be inverted to present the tool to the work at a different angle and that in this position the tool is also held against rattling or chattering by the thick, rigid, and unyielding member 2a.

Having fully described and illustrated my invention, what I claim is- A lathe-tool holder comprising a shank adapted to be clamped in the tool-post of the lathe, said shank having one of its ends bifurcated, one member of said bifurcation being relatively thick, rigid and imyielding, the other'member of said bifurcation being rela- Sol IOO

tively thin and yielding, said members being adjustable in an almost complete circle and provided With alining openings, a clamp-bolt `held against rattling or chattering by the mounted in the openings of the members and comparatively thick rigid and unyielding provided With an opening, a tool adapted to member.

5 have one of its ends positioned in the open-v In testimony whereof I aifix my signature I5` ing of the clamp-bolt, and a nut mounted in presence of tWo Witnesses. upon the bolt and adapted to be adjusted JOHN. W. REYNOLDS. to move the yielding member in the direc- Witnesses: tion ofthe rigid member to secure the tool in LATHROP H. BALDWIN,

1o position, said tool being freely andi quickly l MAUDE L. CHrsrroLM. 

